JP2000208209A - Connector for power supply connection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector having a structure capable of preventing false connection between an AC and a DC in a connector for AC power supply connection and a connector for DC power supply connection. SOLUTION: A connector for power supply connection comprises a plug connector and a receptacle connector. The plug connector comprises a plug block, a socket contact, a gasket 8, and a coupling ring 9. The receptacle connector is provided with fittings including a receptacle block, a pin contact, and a gasket. In this structure, groove parts 52, 53 are formed in a respective axial directions at two points on an outer peripheral surface of the plug block. Two protrusions for inserting into the two groove parts 52, 53 are provided in the axial direction of an inner surface of the receptacle block and in respective opposite positions to the groove parts 52, 53 provided on the outer peripheral surface of the plug block.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an AC or DC power supply connector when an AC power supply connector and a DC power supply connector use the same type of connector.

[0002]

2. Description of the Related Art FIGS. 3 (a) and 3 (b) show a partial longitudinal sectional view and a front view of a side view of an AC plug connector A of a conventional AC power supply connector. Four mounting holes 2 are formed in a columnar shape, and are provided with socket contacts to be described later. Also, substantially triangular cutouts 4 and 4 are provided on the left and right sides of the columnar portion so that the protruding portion 3 is left in part in the axial direction. The oblique cross-shaped pattern at the tip of the plug block 1 seen in the front view of FIG. 3B is one in which the cross-shaped portion is a shallow groove 5.

A socket contact 6 is provided with a plurality of slits 7 in a longitudinal direction at a front end portion so as to surely make contact with a pin contact described later, and a core wire of a cable described later is soldered at a rear end portion. The same kind of socket contacts 6 are press-fitted into the mounting holes 2 of the four plug blocks 1. Reference numeral 8 denotes a gasket, 9 denotes a coupling ring, which is rotatable around the outer peripheral surface of the plug block 1,
And it is inserted so as not to come off by overmolding, which will be described later.
Are provided to fix the connection with an AC receptacle connector described later. Reference numeral 11 denotes a cable, and reference numeral 12 denotes a function of protecting the connection portion by overmolding. Reference numerals 13, 14, and 15 are shrinkable tubes that protect the connection portion and have a waterproof function. Reference numeral 16 denotes a ring having a function of preventing the cable 11 and the overmold 12 from coming off and fixing.

FIGS. 4 (a), 4 (b) and 4 (c) show a partial longitudinal sectional view, front view and rear view of an AC receptacle connector B. FIG. In FIG. 4, reference numeral 21 denotes a receptacle block, and a fitting portion with the AC plug connector A is formed with a cylindrical concave portion 22 for receiving the plug block 1, and the inner peripheral surface of the concave portion 22 is formed in an axial direction. The protruding portion 3 of the plug block 1 and the substantially triangular cutouts 4, 4
Protruding portions 24, 2 formed with groove portions 23 to be fitted with
4 are formed. The oblique cross-shaped pattern seen at the bottom of the concave portion 22 of the receptacle block 21 has a shallow groove 25 at the same portion as the tip of the plug block 1 described above. On the small-diameter outer peripheral surface of the distal end portion of the receptacle block 21, a male screw portion 26 to be screwed with the female screw portion 10 provided on the inner peripheral surface of the coupling ring 9 is provided.

[0005] Four pins 27 are press-fitted into the mounting holes 28 of the receptacle block 21. Reference numeral 29 denotes a hexagonal nut, which is screwed to a large-diameter external thread 31 connected to the flange 30 of the receptacle block 21, and the receptacle block 21 is not shown together with the internal toothed washer 32 and the gasket 33. It is fixed to. Since formed in this way, the groove 23 of the receptacle block 21 of the AC receptacle connector B
Then, after the projections 3 of the plug block 1 of the AC plug connector A are fitted and fitted together, the coupling ring 9 of the AC plug connector A is rotated, and the receptacle block 21 is screwed into the male screw portion 26 of the receptacle block 21. Can be more firmly fixed.

FIGS. 5 (a) and 5 (b) show a partial longitudinal sectional view and a front view of a side surface of a DC plug connector C of a conventional DC power supply connection connector, which are shown in FIGS. 3 (a) and 3 (b). The only difference from the AC plug connector A is the plug block 41 for DC. The other socket contacts 6, gaskets 8, coupling rings 9 and the like are the same as those of the AC plug connector A. That is, the plug block 41 has a substantially cylindrical shape on the tip end side, and is provided with four mounting holes 42 in which the socket contacts 6 are mounted. A groove 43 is provided only at one location in the axial direction at a predetermined location on the outer periphery of the columnar shape.

FIGS. 6 (a), 6 (b) and 6 (c) are a partial longitudinal sectional view, a front view and a rear view, respectively, of a DC receptacle connector D of a conventional DC power supply connector.
The difference from the AC receptacle connector B shown in (a), (b), and (c) is that the DC receptacle block 4
4 only, other pin contact 27, hex nut 2
9, the internal tooth washer 32, the gasket 33 and the like are the same as the AC receptacle connector. That is, the DC receptacle block 44 has a cylindrical concave portion 45 formed at the distal end portion for receiving the plug block 41 of the DC plug connector C, and the plug block 41 is formed in the axial direction of the inner peripheral surface of the concave portion 45. A protruding portion 46 that fits and is inserted into the groove 43 is formed. The DC receptacle receptacle block 44 also has a mounting hole 47 for press-fitting the pin contact 27.
Is provided.

The DC receptacle block 44
A male screw portion 48 that is screwed with the female screw portion 10 provided on the inner circumferential surface of the coupling ring 9 is provided on the small-diameter outer peripheral surface at the distal end of the coupling ring 9. With this configuration, the protrusion 43 of the receptacle block 44 of the DC receptacle connector D is aligned with the groove 43 of the plug block 41 of the DC plug connector C, and the two are fitted together. Can be firmly fixed by rotating the coupling ring 9 with the male screw portion 48 of the receptacle block 44.

As described above, although the AC plug connector A of the AC power connection connector and the DC plug connector C of the DC power connection connector described above, and the AC receptacle connector B and the DC receptacle connector D have similar shapes, The structure does not allow connection by mistake. That is,
As described above, in the AC power supply connection connector, the fitting between the AC plug connector A and the AC receptacle connector B is performed by the protrusion 3 on the outer peripheral surface of the AC plug block 1 and the groove 23 on the inner peripheral surface of the AC receptacle block 21. The DC power connector is DC plug connector C
And the DC receptacle connector D are fitted into the groove 43 on the outer peripheral surface of the plug block 41 and the receptacle block 44.
This is performed by the protrusion 46 on the inner peripheral surface.

[0010]

However, in the above-described conventional structure for preventing incorrect connection, a problem arises when the AC plug connector A is erroneously connected to the DC receptacle connector D. Generally speaking, when the socket contacts 6 of the AC plug connector A are to be inserted in alignment with the pin contacts 27 of the DC receptacle connector D, the protrusions on the inner peripheral surface of the receptacle block 44 of the DC receptacle connector D will be considered. The fitting cannot be performed because the protruding portion 46 and the protruding portion 3 on the outer peripheral surface of the plug block 1 of the AC plug connector A face each other, but the socket contact 6 of the AC plug connector A and the pin contact of the DC receptacle connector D do not fit. 27, the facing relationship between the projecting portion 46 on the inner peripheral surface of the receptacle block 44 of the DC receptacle connector D and the projecting portion 3 on the outer peripheral surface of the plug block 1 of the AC plug connector A is lost. , Which can be inserted slightly.

In this state, when the coupling ring 9 of the AC plug connector A is rotated to join the DC receptacle connector D by screwing, the front end face of the plug block 1 of the AC plug connector A is connected to the DC receptacle connector. There is a case where the pin D contacts the D pin contact 27 and is fixed without being connected. Further, depending on the manner of fitting, a case where the pin contact 27 of the DC receptacle connector D is bent and slightly inserted into the insertion hole of the socket contact 6 of the plug block 1 of the AC plug connector A may be fixed. . Particularly, in this case, when an electrical connection occurs, it is expected that the connected device will be seriously affected. The present invention provides a power supply connector that does not cause such an erroneous connection, and particularly relates to a structure of a DC power supply connector.

[0012]

A power connector according to the present invention comprises a plug connector and a receptacle connector, wherein the plug connector includes a plug block, a socket contact, a gasket, and a coupling ring, and the receptacle connector includes a receptacle. A power supply connector provided with mounting parts including a block, a pin contact, and a gasket, wherein the plug block has two axially formed grooves on an outer peripheral surface thereof and an inner peripheral surface of the receptacle block. In the axial direction, two protruding portions inserted into the two groove portions are provided at positions opposed to the two groove portions provided on the outer peripheral surface of the plug block. Is what you do.

[0013]

FIG. 1 is a front view showing an embodiment of a DC plug connector of a power supply connector according to the present invention. The same parts as those of a DC plug connector C shown in FIG. Is shown. FIG. 5 is a partial vertical sectional view of a side surface of the embodiment of the DC plug connector of the present invention.
Since it is the same as (a), it is omitted. In FIG. 1, 5
Reference numeral 1 denotes a plug block, which is provided with two grooves 52, 53 in the axial direction of the outer peripheral surface of a substantially cylindrical portion formed on the fitting side of the plug block 51. Although the shape of the groove is not particularly limited, in this embodiment, the groove is formed in a substantially semicircular shape, and the other groove 53 is formed as a slightly larger groove than the one groove 52. Also, the groove 5
It is preferable that the reference numerals 2 and 53 are provided so as not to be opposed to the outer peripheral surface of the cylindrical portion. The mounting holes 54, socket contacts 6, gaskets 8, and coupling rings 9 of the socket contacts of the plug block 51 of FIG. 1 are the same as those of the DC plug connector C of FIG.

FIG. 2 shows the DC of the power supply connector of the present invention.
FIG. 6 is a front view showing an embodiment of the receptacle connector, and the same parts as those of the DC receptacle connector D of FIG. 6 shown as a conventional example are indicated by the same symbols. Note that a side partial vertical cross-sectional view and a rear view in the embodiment of the DC receptacle connector of the present invention are the same as those in FIG. In FIG. 2, reference numeral 55 denotes a receptacle block, and in the axial direction of the inner peripheral surface of the plug-fitting cylindrical portion of the receptacle block 55, the outer peripheral surface of a substantially cylindrical portion formed on the fitting side of the plug block 51 described above. 2 provided in the axial direction
The grooves 52, 53 are located at positions facing the two grooves 52, 53.
Protrusions 56 and 57, which are slightly different in size, are provided to be inserted into the respective 53. The pin contact 27, the hexagon nut 29, the internal tooth washer 32, the gasket 33 (not shown), and the like in FIG. 2 are the same as those in the DC receptacle connector D in FIG.

As described above, the receptacle block 55 of the DC receptacle connector of the power supply connector according to the present invention has two projecting portions 56,
Since the plug 57 is provided, the peripheral edge of the front end face of the plug block 1 of the AC plug connector always comes into contact with one or both of the protrusions 56 and 57 of the receptacle block 55, so that it is impossible to fit the plug block 1. Erroneous connection can be prevented.

In the above-described embodiment, the plug block 51 of the DC plug connector of the DC power supply connection connector is used.
And two groove portions 52 and 53 or two projecting portions 56 in the receptacle block 55 of the DC receptacle connector.
Although the example in which the groove 57 is provided has been described, the grooves 52 and 53 are provided.
The protrusions 56 and 57 may be provided on the receptacle block 55 and the plug block 51 in reverse. Further, the two groove portions 52 and 53 or the two projecting portions 56 and 57 may be provided in the plug block 1 and the receptacle block 21 of the AC power supply connector instead of the DC power supply connector.

[0017]

As described in detail above, the power supply connector according to the present invention cannot be fitted into the receptacle block of the DC power supply connector and the plug block of the AC power supply connector, and therefore, as in the prior art. The pin contact and plug block of the receptacle connector due to accidentally forcibly fitting into the connector connector are not damaged.
In addition, there is no possibility that the connected equipment is damaged due to the connection of the AC power supply and the DC power supply, and further, there is no fear of erroneous connection of the power supply. It has effects such as becoming.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a DC plug connector of a power supply connector according to the present invention.

FIG. 2 is a front view showing one embodiment of a DC receptacle connector of the power supply connector according to the present invention.

FIG. 3 is a partial vertical cross-sectional view and a front view showing an example of an AC plug connector of a conventional AC power supply connector.

FIG. 4 is a partial longitudinal sectional view, a front view, and a rear view showing an example of an AC receptacle connector of a conventional AC power supply connector.

FIG. 5 is a partial vertical sectional view and a front view of a side view showing an example of a DC plug connector of a conventional DC power supply connection connector.

FIG. 6 is a partial vertical sectional view, a front view, and a rear view of a side view showing an example of a DC receptacle connector of a conventional DC power supply connection connector.

[Explanation of symbols]

Reference Signs List A AC plug connector B AC receptacle connector C DC plug connector D DC receptacle connector 1 AC plug block 2, 42 Mounting hole for socket contact of AC plug block 3 Projecting portion of AC plug block 4 AC Triangular cutout of plug block 5 Cross-shaped groove at the tip of plug block for AC 6 Socket contact 7 Slit of socket contact 8, 33 Gasket 9 Coupling ring 10 Female thread of coupling ring 11 Cable 12 Overmold 13, 14, 15 Shrinkable tube 16 Ring 21 AC receptacle block 22 AC receptacle block recess 23 AC receptacle block groove 24 Projection of AC receptacle block Portion 25 Diagonal cross-shaped groove at bottom of receptacle block for AC 26 Small-diameter male screw portion of receptacle block for AC 27 Pin contact 28 Mounting hole for pin contact of receptacle block for AC 29 Hexagonal nut 30 Receptacle block for AC Flange portion 31 Large-diameter male screw portion of AC receptacle block 32 Internal toothed washer 41, 51 DC plug block 42, 54 Mounting hole for socket contact of DC plug block 43, 52, 53 DC plug block Receptacle block for DC 45 Receptacle block for DC 45 Recessed part of receptacle block for DC 46, 56, 57 Projecting portion of receptacle block for DC 47 Mounting hole for pin contact of receptacle block for DC 48 Receptacle block for DC The small diameter of the external thread portion of

Claims (1)

[Claims] 1. A plug connector comprising a plug connector and a receptacle connector, wherein the plug connector includes a plug block, a socket contact, a gasket, and a coupling ring, and the receptacle connector includes a mounting block including a receptacle block, a pin contact, and a gasket. In the power supply connector, the plug block has grooves formed in two positions on the outer peripheral surface of the plug block, and is provided on the outer peripheral surface of the plug block in the axial direction of the inner peripheral surface of the receptacle block. A power supply connector characterized in that two protruding portions to be inserted into the two grooves are provided at positions facing the two grooves, respectively.